Tension device for spools.



J. LARSON.

TENSION DEVICE FOR SPOOLS.

APPLICATION FILED DEC. 2. I912.

Patnted Apr. 13, 1915.

JOHN LARSON, OF NEW BRITAIN, CONNECTICUT.

TENSION DEVICE FOR SPOOLS.

Specification of Letters Patent.

Patented Apr. 13, 1915.

Application filed December 2, 1912. Serial No. 734,587.

To all whom it may concern Be it known that I, JoHN LARSON, a citizen of Sweden, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Tension Devices for Spools, of which the following is a specification.

This invention relates to improvements in tension devices for spools and its object is to produce a device of this class adapted to take up the slack in the warp caused by stopping the loom or from other causes.

The invention consists in the combination and arrangement of parts to be hereinafter fully described in the following specification, pointed out in the claims and illustrated in the accompanying drawing which forms a part of the specification and in Which Figure 1 is a view of my device in section in side elevation showing its attachment to the spool. Fig. 2 is an end view of the spool and attachment and is taken on line 22 of Fig. 1. Fig. 3 is a bottom plan of the spool showing the means for attaching my device. Fig. 4 is a plan of the spring employed. Fig. 5 is a plan of the ratchet that engages the spring and is secured to the bottom end of the spool.

Like reference characters indicate corresponding parts throughout the several views.

The spool 1 has its shaft 2, upon which it rotates freely, reduced at either. extremity.

as at 3 and made fast to the loom frame 4 thus making the shaft stationary. The lower circular end 5 of the spool is provided with a plurality of cavities 6 adapted to receive and retain the ends of pron 7 made integral with an interiorly serrate annular rack or ratchet 8 which is thereby secured to and rotated with the said spool end 5. The rack 8 rests upon a bearing plate or disk 2'. Within the rack 8 a sprin 9 is disposed and one end of said spring is astened to the reduced portion 3 of the spool shaft and the other end is bent as at 10 and adapted to travel over the serrations of the rack as the said rack is rotated as is plainly shown in Fig. 2 thus affording a frictional resistance to the rotation of said rack and tending when the machine is stopped to reverse the spool a portion of one revolution thus taking up whatever slack may have been occasioned. A second bearing plate or disk 2" rests upon the rack 8 and has a central portion which forms a support for the lower end of the spool.

What is claimed is 1. In combination, a creel having a stationary shaft secured at one end thereto, a spool rotatable on the shaft, an annular member having interlocking engagement with the spool and provided with internal rack teeth, and a volute spring secured at its inner end to said shaft and having its outer end bent outwardly and adapted to have a positive step-by-step engagement with the teeth of the rack.

2. In combination, a creel having a shaft secured at one end thereto, a spool rotatable on the shaft'and provided with sockets in one end thereof, a bearing disk secured to .the shaft, an annular member resting on the bearing disk and formed with internal rack teeth and upstanding prongs adapted to fit in the sockets of the spool, a spring secured at one end to the shaft and having a deflective free end ada ted'to have a step by-step engagement wit the rack teeth and a second disk resting on said annular member and adapted to confine. the spring within the rack teeth.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two subscribing witnesses.

JOHN LARSON.

Witnesses:

Anon DANIELSON, JOHN A. ABRAHAMSON. 

